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(NoModeL) 3 Slieets-Sheet 1. I J. G. LEPFINGWELL.

CUTTING MACHINE. No. 415,045. Patented Nov. 12, 1889.

. CUTTING MACHINE." NO- P t ted NOV. I (1 4 v lll 3 Sheets-Shel; 2 J. G. LEFFINGWELL.

J. G. LEPFINGWELL;

3 Sheets-Sheet- 3.v

(No Model.)

CUTTING MACHINE.

J Patented Nov[ 12, 18 89. E y??- N. PETERS. Pnomum hw. Walhington. n.c

UNITED" STATES;

PATENT OFFICE.

J OHN'G. LEFFINGVVELL, NEVABK, NEW' JERSEY, ASSIGNOR OF ONE- HALF TO MARGARET A. MATTESON, OF SAME PLACE.

CUTTING-MACHINE.

I SPECIFICATION forming part'of Letters Iatent No. 415,045, dated November 12, 1889. Application filed NovemberZl, 18l88. Serial razelazs. (NomodeL) T0 at whom it may concern: j Be it known that 1, JOHN G. LEFFINGWELL;

va citizen of the United States, residing at other pieces to be used in building, and gen-' erally for simplifying and perfecting the art of cutting timber smoothly and with great rapidity.

In the accompanying drawings, Figure 1 is a side elevation of my improved machine.

Fig. 2 is a vertical longitudinal. sectional view of the same. Fig. 3 is a top plan. Fig. 4 isa detail side elevation of one of the fences to show more clearly the manner of attach-' ment between the same and the top or bed plate of the machine-frame, and Fig. 5 is a vertical transverse section through the cutter-head.

Referring to the said drawings by letter, A represents a table or bed-plate, preferably of heavy cast iron or steel, and which is provided with arc-shaped slots B B in its face, and also with a central elongated opening 0 to receive the cutting-knives hereinafter described.

D D' represent standards rising from the bed-plate A, the last named of which is provided on its inner side with a toothed and rigid rack, marked 0.

F indicates a pitman-rod provided at its upper end with a rack-bar G, and at its lower portion with a retracting spring H. This spring is attached to the lower end of the pitman-rod by screwing it on a block I, and then fastening this block to the pitman by a thumbscrew, as shown. The upper end of the spring is secured to the frame by screwing it into a female-threaded nut 72-, as represented in Fig. 2 of the drawings.

K indicates a toothed pinion bolted or otherwise secured removably to the cuttingknives hereinafter described, and adapted to engage and work with the rack-bars O and G.

L represents cutting knives, preferably arc-shaped and beveled on their inner sides, and which are arranged one on each side of the pinion K, to which they are connected by removable bolts a, as shown. These knives L when pressed downward enter. the central opening 0, over which the timber to be out or trimmed is placed.

For ordinary light work a treadle may be used in operating this machine, such as I have illustrated on the drawings. marked M and connected with the lower end of the pitman and screw thereon. I cut a thread on the lower end of the pitman, and

' screw thereon the elongated nut d, which is rounded on its upper surface, as shown. On the bottom of the treadle I form circular recesses f. These recesses are respectively adapted to rest and rock on the nut d. It is obvious that the sweep of the treadleis regulated and made adjustable at will by this method of connection with the pitman-rod.

The letters 72/ represent removable and adj ustable plates arranged upon the bed-plate, one on each side of the central opening. They are respectively provided with slots 1' and thumb-screws, by means of which they may be moved to or from the knives at will, and thereby enable the operator to use aknife of any desired thickness.

N represents fences or guide-wings pivoted at one end to the bed-plate, as shown at n 011 the drawings. They are also provided with It is bolts 0, that pass through the slots B B, re- I spectively, and are thereby adapted for swinging to the right or left, as may be desired.

In order to adjust the fences to the desired angle right or left, I perforate the bed-plate, as shown at S, and secure the fence at any point required by passing a pin through the opening 0' of the fence into a perforation S. The angles thus secured are positive. By pinning the fence to openings S a ninetydegree angle is secured. By pinning it to S the angle is twenty-two and a half, while by pinning it to S it is forty-five.

In order to provide for holding a supporting-strip under the rabbet of apicture-frame, I have provided an adjustable clamp Y. This clamp is removably connected With the bed bv means of a set-screw Y assin throu h. u b 23 tion is to enable the operator to adjust the sweep of the treadle and thereby the movement of the knives and pinion to the work to be performed. Thus, for example, if the timber to be cut is hard or of great thickness, the pin is passed through the top openings and over the treadle, whereby the latter may be moved throughout the entire length between such pin and a bar or stop at the bottom of the bars. If, however, the work to be performed is light, the pin is passed through a lower opening. A little experience will enable an operator to comprehend the arrangement and enable him to adjust the sweep of the treadle to the work in hand.

Having described my in vention,what I claim 1s 1. In a cuttingmachine, the combination, with a suitable slotted bed-plate and frame, of an arc-shaped cutting-knife, a spur-wheel axially secured to this knife and engaging with a fixed rack of said frame, a fixed knife 71/, secured to the said bed-plate, a verticallyinovable rack engaging with said pinion opposite the fixed rack, and an adjustable fence N, substantially as described.

2. In a cutting-machine, the combination, with a slotted bed-plate and a guiding-frame thereon, of arc-shaped vertically and cireu-.

larly movable cutting-knives, the intermediate toothed pinion axially secured to these knives, a fixed rack and a vertically-movable rack engaging With said pinion, stationary cutting-blades h,adjustably secured to the bed-plate on opposite sides of its slot, a springactuated pitman-rod extension of the said movable rack, means for depressing this rod and its rack, and adjustable fences or gages for prope: 1y presenting the work to the cutters, substantially as described.

The combination, with a bed-plate provided with stationary but adjustable cutting-blades h and an adjustable gaging-fence, of a circularly-movable cutting-blade L, adapted to receive vertical movements, the stationary and movable racks for giving these movements to said blade L, a pitman-rod extension of the movable rack,'and a recoilspring on said rod, substantially as specified.

t. The combination, in a cutting-machine, of the following instrumentalities, to wit: a slotted bed-plate prow ided with stationary knives on each side of the slot of said plate, adjustable gage-fences and adj ustable clamps Y, cutting-blades of segmental or are form, a toothed pinion secured to these blades between them, a stationary rack C, a verticallymovable rack G, engaging with said pinion, a pitman-rod extension of the rack G, provided with a recoil-spring, and a treadle to which said rod is suitably attached, all substantially as described.

I11 testimony whereof Iaflix my signature in presence of two witnesses.

J OIIN G. LEFFINGWELL.

Witnesses:

S. PERIT RAWLE, HENRY A. .ToDULL. 

